Wrench.



1.1. LEE.

WRENCH. v APPucATmu FILED JUNE 6.1918.

1 291 940. Patnd Jan; 21,1919.

UNITED sTATEs PATENT oEEIoE.

' JACOB J. LE, 0F AGATE, NORIlI-Il DAKOTA.

WRENCH.

To all whom t may concern.'

Be it known that I, JACOB of theUnited States, residing atAgate,in the county of Rolette andState of North Dakota, have invented certain` new and useful Improvements in` Wrenches, of which J. LEE, a citizen the following is a specification.

This invention relates to wrenches and while the wrench embodying the present invention is designed primarily for employment as a pipe wrench, it may also bev used as a nut wrench'. It is a well-known fact that in the use of the ordinary pipe wrench, it is practically impossible to tighten the wrench to the 'pipe to be gripped to such an extent as to prevent slipping, where the wrench is of that type embodyinga sliding jaw and a nut foradjusting the said jaw along the stock of the wrench. When the adjusting nut is tightened to the fullest possible degree by hand, the jaws of the wrench will only frictionally engage the surface of the pipe'and the serrations upon the j aw will not bite into the pipe as should be the case in order to positively prevent slipping. The present invention therefore has as its primary object to provide a wrench of the type mentioned with means whereby the sliding jaw may be caused to bite into the pipe or rod to be turned, after the initial adjustment of the jaw has been obtained.

A further object of the invention is to provide a wrench so constructed that the same will securely grip the pipe or rod regardless of the direction in which the wrench is rotated and without likelihood of the wrench breaking under the strain required to turn the said pipe or rod.

Another object of the invention is to so construct the wrench that it may be immediately released when desired although when actually in use the serrations of its jaws will bite into the pipe or rod.

In the accompanying drawings:

Figure 1 is a side elevation of the wrench embodying the present invention;

Fig. 2 is a sectional view therethrough, the shank and fixed jaw of the wrench being, however, shown in elevation.

In the drawings the numeral 1 indicates the stock of the wrench and 2 the usual fixed jaw which is rigid with the outer end of the stock, the jaw having a slightly concave pipe engaging face 3 and a flat nut engaging face 4, yand the said faces being located at opposite sides of the stock 1.

f Specification of LettersvPatent. Patented ,1311,21 1919,'L Application mea June 6,1918; serial No. 238,521. y i

The sliding jaw of the wrench is indicated in'A general by the numeral 5V and thesame comprises a body 6 having a preferably inserted jaw .7 provided with transversel teeth or serrations indicated bythe numeral 8. The said face 7 opposes the face 3 and the faces are to coact in gripping the pipe or rod to be turned. In that side of the stock opposite the side at Ywhich the face 7 is located, the jaw 5 is provided Vwith a flat nut engagingface 9 which opposes the face 4. The body 6 of the jaw 5 is formed with a longitudinally extending substantially rectangular bore 10 receiving the stock 1 and adapting the said jaw 5 to be slidably adjusted along the said stock. That end 4of the bore 10 which opens at the engaging end of the jaw 5 is of dimensions to substantially exactly receive the stock, but'from its said end the said bore is gradually enlarged, or in other words, has its longer transverse dimension gradually increased so that at its other end the said bore is of a width greater than the width of the stock 1 thereby permitting of canting of the jaw upon the said stock. In order to cbtain'the desired result a is preferable am one Side wan of the bore 10, indicated specifically by the numeral 11 extend parallel to the longitudinal axis of the body of the said jaw and that the other side wall of the said bore. indicated by the numeral 12, extend at a slight angle to the first-mentioned side wall of the bore so that when the iaw is in frictional engagement with the pipe to be turned, the wall 11 will engage against the adiacent side of the stock 1 but when the iaw is canted so as to firmly bind the pipe. the other' wall 12 of the bore will engage the corresponding side of the stock, or substantially engage the same.

The body of the iaw is formed with a transverse opening 13 and this opening receives the usual milled nut 14 which fits. the threads 15 formed upon the edges of the stock 1, it being understood that the faces of the nut 14 are designed to engage against the opposite walls of the opening 13 so that when the nut is rotated the jaw will be fed along the stock of the wrench toward or from the iaw 2. The body 6 is further formed with a slot or recess 16 located in that side' of the body at which the inserted face 7 is located, and this slot or recess opens int-o the opening 13. The numeral 17 indicates a :finger lever having an eccentric head 18 which is rotatably mounted upon a pivot A is swung outwardly the head 18 will clear the periphery of the nut 111Vr and they nut mayv be rotated so as to bring the serrated face of the inserted jaw 7 into engagement withy the pipe to be turned, the face 3 of the jaw 2 also engaging the said pipe. Whenthe sliding jaw has been thus adjusted,i thev wrench may be caused to more securely grip the pipe or rod by swinging in the finger lever 17 until the same lies against the adjacent edge ofthe stock or" the wrench. In thus moving the linger lever, the eccentric head 18 is caused to ride against the periphery of the nut 14 and as a consequence the jaw is canted with relation to the stock ot' the wrench and also with relation to the nut 14:, and as a result of this canting the serrations 8 of inserted jawfface 7 are caused to dig or bite into the surface` of the pipe to eiieetually prevent slipping of the wrench. Y

It will be understood that when the lever of the locking device is swung back against the stock of the wrench, it is automatically locked in place and remains so until manually swung outwardly.

Having thus described the invention, what is claimed as new is:

1. A wrench including a threaded stock having a handle and provided with a xed jaw, a movable jaw slidablymounted on the ve cents eac stock, a nut engaging the stock andseated in a transverse opening in the sliding jaw, and an eccentricy pivotally mounted upon the sliding jaw and provided with an operating lever the free end of which is movable into engagement with the stock, said lever when swung in the direction of the stock causing the eccentric to bind against the periphery rofs'aidnutl whereby to cant the slid ing jaw and lock the same in.l canted position with relation tothe stock; y'

Y, 2. A wrench Yincl dinga ythreaded stock having a handle and provided with a iiXed jaw, a movable jaw slidably mounted the stock and provided with a transverse opening, there being a recess formed in one side of lthe movable jaw y'opening through the bottom thereof and communicating with the transverse opening, a* nut ittediny the transverse opening and engaging the threads on the stoclr7 andl an n eccentric pivotallyy mounted in the recess and provided with an operating lever the free end of which is movable into engagement with the adjacent longitudinal edge of the stock, said'lever when swung in the direction of the stock causing the eccentric'. to bind against the periphery of the nut whereby to cant the sliding jaw and lock the same sition with relation to the stock.

In testimony whereof I-'aiiixmy signature, JACOB'J. LEE. KL; 5.1 n

in canted poe i e by` addressinfthe Commssioner'et Baten-tus; 1 

